Quick drone synth switch question

In this schematic of a simple drone synthesizer, why are the switches connected in such a way that when they are closed, a (small) current would flow trough the 8*100k resistors to ground? Wouldn't it make more sense to use toggles instead, that couple the data inputs of the 74HC151 either to ground or to Vcc (through the resistors)? That way the circuit would draw less current while some of the inputs are toggled off. And you could still use a debounce cap, right?